ASN Wikibase Occurrence # 39254
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| Date: | Saturday 2 November 1996 |
| Time: | 14:44 LT |
| Type: | Schweizer SGS 1-36 |
| Owner/operator: | The Cloud Base |
| Registration: | N3616Z |
| MSN: | 9 |
| Total airframe hrs: | 1742 hours |
| Engine model: | Subaru%20LEGACY%20EJ22 |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Boulder, CO -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | , CO (1V5) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
A witness observe the glider to come from behind the mountains in a wings level attitude, traveling in a northeast direction. She said the glider made a complete 360-degree roll to the right about its longitudibal axis. The glider rolled out on a more easterly heading, then began losing altitude in an increasingly nose down attitude and entered either a spin or spiral. She then observed the wings to fail and fold aft along the fuselage. According to NTSB's metallurgist's report, 'all fractures in both wing sections were typical of overstress separations. No evidence of fatigue or other types of preexisting cracking was found.'
Probable Cause: The pilot exceeding the design stress limits of the aircraft by performing an aerobatic maneuver, resulting in total failure of the wing spar.
Accident investigation:
 |
|
Sources:
NTSB FTW97FA033
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 08-Apr-2024 18:08 | ASN Update Bot | Updated [Time, Other fatalities, Departure airport, Source, Narrative, Category, Accident report] |
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